Question

determine the type of magnetic force that each object would experience when near the north pole of a magnet.
object\tattraction\trepulsion\tno force
a paper envelope\t○\t○\t○
the south pole of another magnet\t○\t○\t○
the north pole of another magnet\t○\t○\t○
an iron nail\t○\t○\t○

Explanation:

Step1: Analyze a paper envelope

A paper envelope is not a magnetic material and not a magnet, so it experiences no magnetic force. So select "No force" for it.

Step2: Analyze the south pole of another magnet

Opposite poles of magnets attract. North pole and south pole are opposite, so the south pole of another magnet will be attracted to the north pole. Select "Attraction" for it.

Step3: Analyze the north pole of another magnet

Like poles of magnets repel. North pole and north pole are like poles, so the north pole of another magnet will be repelled by the north pole. Select "Repulsion" for it.

Step4: Analyze an iron nail

Iron is a ferromagnetic material, and ferromagnetic materials are attracted to magnets. So an iron nail will be attracted to the north pole. Select "Attraction" for it.

Answer:

• a paper envelope: No force
• the south pole of another magnet: Attraction
• the north pole of another magnet: Repulsion
• an iron nail: Attraction